<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
  <form method="get" action="">
    姓名：<input type="text" name="username"><br>
    密码：<input type="password" name="password"><br>
    <input type="submit" value="提交">
  </form>

 <form method="post" action="">
     姓名：<input type="text" name="username"><br>
     密码：<input type="password" name="password"><br>
     <input type="submit" value="提交">
 </form>

</body>
</html>